Improve buffer management in pipeReader

clients/go/pipeio/pipeio.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"io"
 	"bufio"
+	"errors"
 )
 
 const defaultBufSize = 65536
@@ -54,14 +55,17 @@ func (preader *pipeReader) RecvMessage() []byte {
 	if preader.scanner.Scan() {
 		return preader.scanner.Bytes()
 	}
-	if err := preader.scanner.Err(); err != io.EOF {
+	if err := preader.scanner.Err(); err != nil && err != io.EOF {
+		if err == bufio.ErrTooLong {
+			err = errors.New("pipeReader buffer too small!")
+		}
 		panic(err)
 	}
 	return nil
 }
 
 func (preader *pipeReader) BufSize(size int) {
-	preader.scanner.Buffer(make([]byte, size), size)
+	preader.scanner.Buffer(make([]byte, defaultBufSize), size)
 }